30+ Years Experience
Sales • Service • Repairs
Have Questions?
Sewing Machine Experts
Professional service & support
In-House Experts
We know our machines
Financing Options
Buy now, pay over time
Nationwide Delivery
Shipping available across the U.S.
G20 Magnetic Seam Guide for Sewing Machines
G20 Magnetic Guide • Adjustable Seam Allowance • Tool-Free Placement • 1 Piece
The G20 Magnetic Seam Guide is a removable sewing accessory that helps operators keep a steady distance between the fabric edge and the stitching line. Position it on a suitable metal sewing-machine surface to create a visual and physical reference for straighter seams.
Its magnetic attachment makes it easy to reposition when changing seam allowances. JMJ Sewing Machines recommends this type of guide for garment alterations, quilting, practice seams, and everyday sewing tasks where repeatable fabric alignment is helpful.
Key Features
- Magnetic Attachment: Holds to compatible ferromagnetic needle plates or machine beds.
- Adjustable Placement: Move the guide to suit the desired seam allowance.
- Fabric Edge Reference: Helps maintain more consistent stitching alignment.
- Tool-Free Use: No permanent mounting or drilling required.
- Compact Accessory: Convenient to remove and store between projects.
Recommended Applications
- Garment construction and alterations
- Hemming and straight seams
- Quilting and patchwork
- Home sewing and sewing practice
- Compatible industrial sewing workstations
Technical Specifications
| Model / Style | G20 |
| Product Type | Magnetic Seam Guide |
| Attachment | Magnetic, removable |
| Installation | No tools required |
| Suitable Surface | Compatible magnetic metal needle plate or machine bed |
| Quantity | 1 Piece |
IMPORTANT — COMPATIBILITY NOTICE
Before use, confirm that your machine has a suitable magnetic metal surface and that the guide will not interfere with the presser foot, feed mechanism, or needle. Do not use a magnetic guide on computerized or electronic sewing machines unless the machine manufacturer permits it. Compatibility depends on the individual machine and its construction.
JMJ Sewing Machines Recommends: Test the guide's position on scrap fabric before starting a finished project. The G20 Magnetic Seam Guide offers a simple way to support consistent seam allowances without permanent changes to your sewing machine.